diff -r 068a8efe7203 -r f6dfe4123709 hotspot/src/share/vm/opto/reg_split.cpp
--- a/hotspot/src/share/vm/opto/reg_split.cpp	Tue Sep 25 15:48:17 2012 -0700
+++ b/hotspot/src/share/vm/opto/reg_split.cpp	Thu Sep 27 09:38:42 2012 -0700
@@ -646,7 +646,7 @@
           // create a new phi node and insert it into the block
           // type is taken from left over pointer to a predecessor
           assert(n3,"No non-NULL reaching DEF for a Phi");
-          phi = new (C, b->num_preds()) PhiNode(b->head(), n3->bottom_type());
+          phi = new (C) PhiNode(b->head(), n3->bottom_type());
           // initialize the Reaches entry for this LRG
           Reachblock[slidx] = phi;